Impact testing machine



3 N. WARSHAW Er'AL 1,984,904

IMPACT TESTING MACHINE Filed Aug. 5, 1933 2 Sheets-Sheet 1 Dec. 18, 1934. N. WARSHAW ET AL IMPACT TESTING MACHINE Filed Aug. 5, 1953 Z SheetS-Sheet 2 Patented Dec. 18, 1934 t 1,9s4,90 4 -f MPA newsm n Nathaniel Warshaw', Boston; and Henry B. Shep- V. Mass.,-assignors tofS towe-Woodk *ard, Newton,

3 L Application August '5,

" 1 1 '4; c im 1 :1:3 )).-vv

The principal object ofjour. invention to provide famachine having striking means to give blows of thesame force simultaneously for purposes of comparison, such lblows, in the preferred form, being struck on twoldiiferent golf balls, base balls or the like to determine'which is the better ball in respect to carrying power, durability and in any other desired respects, the

In the drawings Figure 1 is a front elevation of a machine emvv bodying our invention; 1

Figure 2 is a section on line 2-2 of Figure 1; Figure 3 is a plan section on line3-3 of Figure 1;

Figure 4 is a cut positions of one of the driving members;

Figure 5 is a detail showing the driving member in a different position radially than its position in Figure 4; v

Figure 6 is a section on line 6-6 of Figure 1; and

Figure 7 is a section on line 77 of Figure 4. The frame of the machine comprises two side pieces 1 and 2 and base 3 (broken away). Bolts 4 hold the support 5 to base 3. Suitably fixed to the support, as by welding, are blocks 6 and 7 upon which are mounted rubber cups 8 and 9 to receive and hold golf balls 10 and 11 which are of different construction for the purpose explained above. v

Mounted to rotate in the side frames 1 and 2 is a shaft 12 having counterweight 13 to balance the! strikers described below. Fixed to shaft 12 is gear 14 driven by gear 15 on motor shaft 16 of motor 17, the latter being controlled by switch 18. Belt 19 is driven by pulley 20 on shaft 12 and drives pulley 21 operatively connected to speedometer 22.

Studs 23 and 24 are suitably fixed to shaft 12. Slidably mounted on studs 23 and 24 are sleeves 25 and 26 to which are clamped at 27 and 28 the shanks 29 and 30 of strikers 31 and 32, the main portions of the strikers being preferably ofsteel but having preferably aluminum heads 33 and partial elevation showing differv the path of trip member 39; turning the latter connected at one end with portion 13 and at 34suitably connected to said main portions; each striker being of the same material and the same weight and of thesame form and construction as the'otheras to all offits parts including its head a.

A' is r 'Sleeves 25 and 26f'are. connected byi'integral bridging portion 353 Shaft'36 is mounted to rotate in ears .3,'7 and 38 rigidly connected with, and consequently alwaysrotatingi with, shaft 12. Fixed toshaft 36 is latch 38, which, in the full line position of Figure 2, looks the bridging portion and sleeves 25 and 26 in their inner radial position." .At" the right end of shaft 36 in Figure'3 is integral trip member c 39 and integral' finger 40, spring "41' tending to hold trip member 39 in theposition'of'Figure'fi; the finger 'bearing'againstthje "periphery of shaft 12 to hold the trip member in "said position during the I Mounted in said frame 2 is plunger 42, normally'held in the position of Figure 1 by spring 43. When the strikers have reached the desired speed as indicated by] the speedometer 22, the

, rotation of the headsi33and 34 free of objects 10'an d11. 20

plunger 42 is pressed by hand to the left in Fig- 25 ures 1 and 3 bringing the rubber collar 44 into 2, thus freeing the sleeves 25 and 26 so that,

under the infiuence of centrifugal force, said sleeves move radially outward until their integral collars 45 and 46 engage rubber collars 47 and 48, as shown best'in Figure 2. These rubber collars rest against steel collars 49 and 50', all of said collars being frictionally held on their studs, the head 51 of stud 23 preventing undesired removal of the collars 4'7 and 49, a similar head 52 being provided on stud 24. Springs 53 are theother end with bridge 35 and act to retard the outward radial movement of the sleeves 25 and 26 and act also to return the sleeves to inner radial position as the machine slows down after the strikers have acted, this slowing down following the shutting off of the motor.

Our machine may also be used to test different heads, such as heads of different golf clubs, by connecting such heads to the two strikers and then simultaneously applying blows to objects of the same structure to determine the relative merits of such heads.

In using our'machine the motor is started and the strikers are rotated until the desired speed is indicated by the speedometer, the strikers as shown in Figure 5 and as indicated by the:

lower dot and dash line in Figure 4 The latch 38 is preferably released just after the strikers have passed freely over-the: golf balls so that nearly an entire revolutionisavail-able for the; r.

strikers to move from their inner to-their outer radial positions. When the blows have beenstruck the motor is shut ;;oif',va nd while the machine is coming to a stop springs 53 will return the sleeves and strikers to their inner "radial position and the bridging portionv willbe again latched because of the spring; 451 returning the trip member to normal position' g vIt. will be, observedthat we providea very' accurate test as to different golf balls and the like not only because the blows are struck simultaneously but'becausethe blows are of the same force for the reasonthat the strikers are of the same weight; materiaL, shape, construction and stiffness and the blows. are given at the same speed.

What, we claim is;

1, A testing machine comprising a shaft; two strikers; means to rotate said shaft; means connecting said.- shaft and strikers to cause said strikers to rotatefree of certain objects when the shaft rotates. but. with provision to permit movement of the strikers outwardly radially of the shaft;v and means'toi act; on said connecting means to permit such radial movementof the strikers simultaneously so that the strikers strike said objects simultaneously.

2. A testing machine comprising a shaft; two strikers; means to rotate said shaft; means connecting said shaft and strikers to cause said strikers to rotate free of certain objects when the shaft rotates but with provision. to m r mitt movement of the strikers outwardly radially-bf said shaft; a latch member engaging said connecting means to hold the strikers in their inner radial position; and means to release said latch to permit simultaneous outward radial movement of said strikers;

testing machine comprising a shaft; two strikers; means to rotate said shaft; means connecting said shaft and strikers to cause said strikersto rotate free of certain objects when the shaft rotates but with provision to permit movement of the strikers outwardly radially of said shaft; a latch member engaging said connecting means to hold the strikersmtheir in'ner radial position; means to release said latch to permit simultaneous outward radial-movement of said strikers; and springs operatively" connected' with said strikers to retard thei routward to cause their inward necting said shaft and said striker'tocause said Q striker tov rotate free of a certain object when the shaft rotates but with provision to permit'movement of the striker outward radially of the shaft; andv means to act on said connecting means to permit such radial movement of the striker so that the striker may strike said object. 

